Sandstone
Arenite
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Sandstone
Arenite
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
Calcite
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite
Limestone
Calcium Carbonate (CaCO3)
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Eroded Limestone with Iron Staining
Carbonate Rock (CaCO3)
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
Sandstone
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Polished flint/chert pebble
Microcrystalline quartz (SiO₂), commonly called chert or flint
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based with cement)
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
Weathered Sandstone Cobble
Arenite / Quartz Sandstone
Sandstone
Arenite (SiO2 principal component)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone (Quartz-rich)
Arenite (SiO2 based clastic rock)
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
Fossiliferous Limestone
Bioclastic Limestone (CaCO3)
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Sandstone (likely Quartzose Sandstone pebble)
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Black Opal
Amorphous hydrated silica (SiO2 nH2O)
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 with iron oxide inclusions)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (likely Graywacke or Arkose)
Clastic Sedimentary Rock (primarily SiO2 with various lithic fragments)
Chalky limestone
Micritic limestone, primarily calcite (CaCO₃)